Mercor AI Interview: Format, Retakes, Rules and How to Prepare

The Mercor AI interview is a video and audio conversation with an AI interviewer that asks role-specific questions, records a transcript and evaluates your performance for the listing. Mercor says most interviews take about 20 minutes and that the questions are generated from your resume and the job description. You can take a free Practice Interview as many times as you like, and retake the official interview up to three times. To prepare, get ready to discuss your past work in depth, test your setup in Chrome, and answer in your own words.

Everything about Mercor on this page comes from Mercor’s public talent documentation and website, checked on 2026-10-06. Offermic is not affiliated with Mercor.

What is Mercor?

Mercor is a platform that connects professionals with AI companies and enterprises. Its homepage describes the company as “organizing human intelligence to power the AI economy,” and lists experts such as physicians, lawyers, engineers and consultants. Many roles involve helping AI labs train and evaluate models using professional expertise.

Because Mercor matches experts at scale, the AI interview is central to its process. Mercor’s FAQ says: “Our AI interview is the standard and only method for screening candidates,” and that interviews cannot be done by chat, call or another medium instead.

How does the Mercor AI interview work?

From Mercor’s candidate docs:

• Who asks: An AI interviewer. Mercor’s data policy says it “generates questions based on your résumé and the job description, transcribes your responses, and evaluates your performance.”
• Length: Most interviews take approximately 20 minutes; some are shorter or longer. Mercor publishes no minimum, but an interview that misses “the minimum completion criteria (such as duration)” is not counted as completed, so don’t leave early.
• Content: “Some interviews are technical and require deep discussion of prior experience; others test language or reasoning skills.” The glossary says the interview assesses “your domain knowledge and communication skills,” and names a Domain Expert Interview tailored to a subject such as law, finance or tech.
• Screen share and whiteboard: Some interviews require screen sharing, and only full-screen sharing is supported. Mercor says a “hall of mirrors” effect while sharing is normal and temporary. Some interviews include a whiteboard that saves automatically, with nothing to submit.
• Reuse: “Each unique interview is only necessary to complete once.” A completed interview carries over to every application that needs it, and Mercor says completed steps never expire. One exception: if a listing changes its requirements after you applied, the step can show as Incomplete again and you have to redo it.
• Starting: Sign in, open the Applications tab, open the application and start the interview from its step list. Steps can be done in any order and you don’t have to do the interview right away. Don’t leave it too long: once a listing stops accepting applications, Mercor says you can’t finish an application you had already started.

The interview sits alongside Mercor’s assessments, which its docs describe as structured evaluations of your domain expertise, problem solving, ability to follow instructions and “the quality and clarity of your written or verbal responses.”

Resume requirements before the interview

The interviewer builds its questions from your resume, so the file you upload matters. Mercor’s resume guidelines:

• PDF only, text-based and not a scanned image.
• 1 to 2 pages, under 2 MB.
• A simple layout without images, tables or complex design.
• Clear section headings such as Education, Experience, Skills and Certifications.

When you start an application, an automated check called Application Fit Guidance compares your profile with the listing. It either lets you continue, shows a warning you can ignore, or blocks that application. Mercor says there is no manual override, and that a block applies to that listing only.

Our view: since questions come from your resume, don’t list anything you couldn’t talk about for two minutes.

Retakes and the practice interview

	Practice Interview	Official AI interview
Attempts	Unlimited	Up to 3 retakes, counted across all applications that use that interview
Affects opportunities	No	Yes
Shared with companies	No	Used to evaluate your candidacy and recommend your profile
Tied to an application	No	Yes

How to start a retake. Open the Assessments tab on your dashboard (some Mercor pages still call it the Interviews tab), find the interview with the status Submitted, click the three-dot menu and select “Retake interview.” You don’t need to contact support. If the option is missing, Mercor says to confirm the status is Submitted, refresh the dashboard, then email support with the interview name.

The limit is shared. Mercor’s example: retake an interview twice in one application and you have one attempt left for that interview in every other application. Mercor uses “attempts” and “retakes” interchangeably (one FAQ answer says “your three attempts”) and never says whether your first sitting counts toward the three. Read literally, you get three more tries after the first; the cautious plan is three sittings in total.

Which attempt counts. The latest one, according to the page that answers this for interviews by name. Mercor’s Apply page says “Only your most recent attempt will be considered for evaluation,” and that a retaken AI interview or assessment automatically replaces the previous submission. One line points the other way: the Assessments page says that if retakes are permitted, “your highest score will be retained.” That answer is about assessments in general and doesn’t mention AI interviews, and Mercor doesn’t reconcile the two. Our view: assume the latest attempt replaces the earlier one, and retake only when you have a concrete reason to expect a better result. Applications you already submitted update to the newest interview, though Mercor notes a hiring manager may have started reviewing the earlier version.

When retakes run out. You don’t get more automatically. You can email support with a screenshot or screen recording of the technical issue, plus the interview or listing name, to request a one-time retake. Approval isn’t guaranteed, and Mercor says the three retakes “are intended to cover those cases.”

The Practice Interview. It is free, linked from Mercor’s AI Interview FAQ, not tied to any application and not shared with companies. Mercor doesn’t say whether it is scored, whether you get feedback, or how closely its questions match an official interview. Our view: do it at least once before your official attempt. It’s the only rehearsal on Mercor’s own platform, and it costs you nothing.

Setup requirements

Mercor’s documentation lists these requirements:

• Browser: Chrome (latest) recommended; Edge and Safari supported; Firefox and mobile browsers not supported.
• Device: A computer with a working camera and microphone. Listings that need screen sharing can only be done on a computer.
• Checks: Test camera, microphone and speaker in the waiting room. The “Start Interview” button stays grayed out until camera, microphone and (if required) screen-share checks pass.
• Permissions: In Chrome, click the lock icon in the address bar, set Camera and Microphone to Allow, then refresh. If clicking a button does nothing, allow pop-ups for work.mercor.com.
• Visibility: Your full face visible and your voice clear throughout.
• Environment: Quiet, distraction-free and with a stable connection.
• Audio: Headphones and an external microphone are recommended.
• Materials: Pen and paper, plus a calculator if relevant.

What to do if the interview freezes or the AI stops responding

Mercor documents a fix for each case:

• The AI isn’t responding: Wait 30 to 60 seconds, since short delays happen while it generates a prompt. Then refresh the page and rejoin the session. If that fails, check your connection, clear cache and cookies, turn off VPNs, ad blockers and privacy extensions, or try an Incognito window.
• The AI talks over you or can’t hear you: Keep answers brief, avoid long silences and ask it to repeat the question. If audio problems continue, exit and retake from your dashboard.
• You lost connection or the tab froze: Reopen the Assessments tab and try again. If the session has ended, use Retake interview.
• During the interview: There is a Help button in the interview interface.
• Still stuck: Email support@mercor.com with your operating system and browser version, the interview name, the application and screenshots. Mercor’s support page says most issues are addressed within three hours and that support is available Monday to Saturday. A separate Mercor page says the first reply comes from Melvin, its email AI assistant, and that requests routed to a human typically get a follow-up within one to two business days.

Mercor doesn’t say outright whether a crashed session uses up a retake. Its recovery path for an ended session is the Retake option, and it says the three retakes “are intended to cover” technical problems, so assume it does. Take a screenshot when something breaks: support asks for that evidence before granting an extra attempt.

Language, captions and accommodations

Interviews are in English unless otherwise specified. Captions are on by default; you can turn them off but not expand them.

Mercor’s docs don’t describe an accommodations process, such as extra time or a different format, and they state that interviews can’t be done by chat, call or any other medium. If you need an accommodation, the only documented contact is support@mercor.com. Our suggestion: write before you start an official attempt, not after.

What does the interviewer evaluate, and is there a pass score?

Mercor says the AI evaluates “your performance for the listing,” and that its goal is consistent evaluation across applicants. It doesn’t publish a passing score or a scoring rubric. What its docs do say:

• Even when two listings use the same assessment, “the scoring and weighting may vary.”
• Support “does not provide assessment scores, detailed results, or individualized feedback.”
• Feedback exists for some assessments only. Where it is enabled, it arrives automatically in the submission email and the Assessments tab.
• Human reviewers may review assessments to verify suitability for a role, and Mercor says final decisions are made by project teams.

Our reading of how Mercor describes the interviews: you’re judged on the depth of your real experience, knowledge of your field, and clear, structured answers.

How should you answer Mercor interview questions?

Prepare for deep dives on your experience

Pick three or four projects from your resume that fit the listing. For each, be ready to explain:

• The problem and why it mattered.
• Your specific role and decisions.
• The trade-offs you considered.
• The outcome, and how you measured it.
• What you’d do differently.

This is the STAR method with extra depth. MIT’s career office suggests giving about 60% of an answer to the Action: what you personally did.

Example answer: senior clinician applying for a medical expert role, “Tell me about a complex case where your judgment made a difference.”

Situation

Task

Action

Result

1. Situation

   On a busy night shift, a patient admitted for a routine infection had lab results that were within normal ranges individually but trending in a worrying direction together.

2. Task

   As the senior clinician on shift, I had to decide whether to escalate care before the patient met any formal criteria.

3. Action

   I reviewed the trend across the last three sets of results rather than the latest values alone, re-examined the patient, and discussed the picture with the on-call specialist, explaining exactly which changes concerned me. We agreed on closer monitoring and an earlier review, and I documented my reasoning so the day team could follow it.

4. Result

   The patient's condition changed early the next morning and the team was already prepared, so treatment started without delay. Afterwards I shared the case at our team meeting as an example of reading trends, not single values.

This example is written for illustration; it isn’t a real case.

Keep answers concise and avoid long silences

Mercor’s FAQ says to articulate “clearly and succinctly” and avoid prolonged pauses, since extended silences can make the AI interject. If you need a moment, say “Let me think for a second.” If it interrupts before you’re done, Mercor says you can let it know you weren’t finished. If a question is unclear, ask the AI to repeat or clarify it.

What kinds of questions should you expect?

Mercor doesn’t publish its question lists, and it asks candidates not to share specific questions. From how it describes its interviews (questions generated from your resume and the job description, deep dives on prior experience, tests of language and reasoning), prepare for these types:

• Background: “Walk me through your experience” or Tell me about yourself. Keep it to about 90 seconds and tie it to the listing.
• Project deep dives: “Tell me about a project where…” followed by questions on your decisions.
• Problem solving: “Walk me through how you solved…” See complex problem you solved.
• Domain knowledge: Clinical reasoning for medical roles, legal analysis for legal roles, code and system reasoning for engineering roles.
• Explaining your reasoning: Practice explaining a concept from your field to an intelligent non-expert. See explaining something complex.
• Achievements: “What are you proudest of?” See proudest achievement.

Rules on using AI during the interview

Mercor’s FAQ asks candidates to follow its LLM Usage Policy: you can do grammar and wording checks as necessary, but should “refrain from utilizing large language models to compose your responses, rate model responses, generate rationales or explanations, or evaluate code.” The policy itself allows checking grammar and lightly refining phrasing as long as the ideas and structure stay yours, and warns: “Submissions that are evidently produced by artificial intelligence will be identified and flagged accordingly.”

Mercor also asks candidates not to share specific interview questions or screenshots online.

Use AI tools to practice before the interview, not during it.

Identity checks and monitoring

What Mercor’s docs state:

• During the interview: You need a working camera, your full face must stay visible, and some interviews require sharing your full screen. Video, audio and a transcript of official interviews are retained.
• ID verification is a separate step. Mercor uses Persona, a third-party service: you capture a government-issued ID with your camera and record a short selfie video. Mercor says it is required before you can be onboarded to a project. Mercor’s ID-verification and onboarding guides place it on the onboarding checklist that follows an offer, and a prompt can also appear on your Home page or Referral dashboard. The glossary calls it a step “in the application process,” so you may be asked earlier. The interview FAQ doesn’t list it among the checks needed to start an interview. Most verifications finish within moments; some need review that can take up to 1 business day.

What they don’t state: the docs describe no proctoring software or tab-switch detection for the interview, and don’t say what happens to an interview that gets flagged.

Privacy: what Mercor says it does with your interview

According to Mercor’s docs:

• It retains video/audio recordings and an AI-generated transcript of official interviews to evaluate your candidacy and recommend your profile to employers.
• Mercor’s matching system and relevant hiring managers at companies can access past interviews and assessments.
• In some cases human contractors help Mercor assess interview or matching performance. Mercor says their feedback improves its models and is never used for hiring decisions.
• It does not sell your interview data.
• The interview FAQ says your interview data won’t be used to train AI models. The data policy is narrower: it rules out training external AI models and third-party LLMs, and lists training Mercor’s internal recommendation models among the uses of your data.
• Practice interviews are not shared with companies.
• It can’t share recordings or transcripts with you.
• You can request deletion of your account and data, including the interview and transcript, in Account Settings. Mercor may retain data where the law requires, and deletion doesn’t remove data from companies that already accessed it.

A 3-day Mercor prep plan

Day 1: Re-read the listing and your resume, and check that the resume on your Mercor profile is the current one. Pick three or four projects and write STAR notes with extra depth on decisions and trade-offs.

Day 2: Practice out loud. Explain each project in two minutes, then answer “why did you choose that?” and “what would you change?” for each. An AI mock interview helps here: Offermic, the app we make, runs spoken mock interviews based on your resume and a job posting, asks follow-ups, and scores each answer from 0 to 100 with feedback. Practicing with a colleague works too.

Day 3: Take Mercor’s Practice Interview in Chrome with your real setup. Fix anything that went wrong (audio, lighting, pauses), then take the official interview when you’re fresh.

After the interview

Submit the application. Finishing the interview only completes that step. The Applications section of your dashboard shows each application as “Ready to submit” or “Submitted,” and Mercor says you still need to click Submit for project managers to review it. A confirmation screen then shows the expected timeline.

Wait for a decision. Mercor says it usually takes 2 to 4 weeks to hear whether you’ve moved to the next stage, because of application volume, and that you’ll be notified by email once a final decision is made. It says it can’t share specific feedback on a rejection. A submitted application can’t be edited or withdrawn.

Keep applying. Because interview results carry over, one strong interview can support several applications. Mercor also says strong interview and assessment results can lead to Instant Offers for roles you didn’t apply to.

If you get an offer. It appears in the Offers tab. You sign the offer letter first. The steps after that depend on the project and can include a Worker Agreement, a tax form, a background check you must clear before logging hours, Persona ID verification and payment setup through Stripe, or Wise where Stripe is unavailable.

Related guides

• How to pass an AI interview: general principles across platforms.
• micro1 interview and Alignerr interview: two other expert networks that screen with an AI interviewer.
• HireVue interview: the one-way video format.
• Resume-based interview questions: how to prepare deep dives on your experience.
• Tell me about yourself: the opener in most AI interviews.